Attachment for lead-pipe presses



(No Model.) 2 Sheets-Sheet 1.

.J. TATHAM.

ATTACHMENT FOR LEAD PIPE PRESSES. No. 327,835. Patented Oct. 6, 1885 fdl.

(No Model.) 2 Sheets-Sheet 2.

J. TATHAM.

ATTACHMENT FOB. LEAD PIPE DRESSES.

- Patented 001;. a. 1885 G, and hollow core and out through the lat:

1 zen of the United States, and

' specification.

U ITED STATES PATENT OFFICE;

JAMES TATHAM, on PHILADELPHIA, PENNSYLVANIA.

ATTACHMENT FOR LEAD-PIPE PRESS ES.

easement-ma forming art of Letters PatentNo. 327,835, dated October 6,1885.

Application filed ma a mes. Serial no. 155,391. (No model.) 1

To all whom, it may concern:-

Be it known that I, JAMES 'I HAM, a citiresident of Philadelphia, Pennsylvania, have invented certain Improvements in Attachments for Lead-Pipe Presses, of which the following isa The object of my invention is to provide a simple device for use in connection with an ordinary lead-pipe press, whereby the latter, at slight expense, is rendered available for the manufacture of lead-covered electrical condoctors. I I

In the accompanying drawings, Figure l is a vertical section, partly in elevation, of sufficient of a lead-pipe press @to illustrate my invention; Fig. 2, an enlarged section of part of the device forming the subject of my invention; Fig. 3,a sectional plan on the line 1' 2, Fig. 2; and Figs. 4 and 5 diagrams illustratingone of the features of the invention.

In Fig. 1, A represents part of the hydraulie cylinder of a lead-pipe press, B part of the plunger of the same, D the lead-reservoir carried thereby, F the interposed hollow column with lateral passage a, and G the upper fixed ram bolted to the cap H, which is secured to the cylinder A by' neans of posts or pillars b.

Upon the hollow column F is supported a block, J, having a central chamber, (2, and opposite lateral passages f f, and into a threaded opening in the bottom of the block is screwed the dieM, the projecting portionof the latter being contained in a recess in the column F. Theregis also a threaded opening in the top of the block J, and into this opening is screwed a hollowcore, N, the upper end of which fits snugly toa block, in the lower. end of the hollowramG.' V

The core N has a detachable lower end, P, held in place by ,a set-screw, at, this detachable end being tapered externally and proj ecting into that portion a; of the die which determines the external diameter of the pipe. The block J forms a holder for supporting the hollow core N above the die.

The lead-reservoir being filled, and an insulated wire drawn through the cap H, ram

era-l opening a of the column F, the plunger-B is elevated so as to cause the reservoir D to ,rise and the ram G to press upon the lead in said reservoir and force the same through the die M, around the end P of the hollow core, and onto the insulated wire, thelatter being drawn through the core by the pipe as the same is formed and discharged throughthe hollow column.

In order to regulate the internal diameter ofthe pipe, and the consequent thickness of the metal forming the same, I make the core N adj ustable in the holder J ,so that the tapered end P of the core may be caused to project more or less into the die, the internal diameter of the pipe being increased as the core is projected and decreased as it is withdrawn. -.This enables me to confine the wire or wires closely by the lead covering, 0r to-increase the internal diameter of the pipe so as to permit the wire or wires to lie loosely therein, as will be readily understood. I

In order to effect the adjustment desired,the core N is screwed into or unscrewed from the holder J to the desired extent, and in order to prevent the access of lead to the threads of the core and holder the latter has a tubular projection, w, fitting snugly to the core N, above the threaded portion of the same, as shown in Fig. 2.

Owing to the use of the hollow-core holder J the bulk of the metal in proximity to the end 1? of the core N is comparatively limited, so

that thesaid core does not become heated to' such an extent as to injuriously afl'ect the insulating-covering of the wire, and as soon as the pipe is formed around the wire it passes into the enlarged chamber 3 of the die, and is chilled fby contact with the air. The coreholderfhowever, is surrounded by the hot 4 1 ad, so that it is maintained at a practically unlform temperature, and thus prevents chilling of the lead in the reservoir and the formation of bad joints in the pipe which isbeing made.

The core-holder is of tapering or conical form,'so as to provide ,the desired broad supporting-base and yet "permit the maintenance of a mass of metal around the core-holder.

The ram G is chambered v for-the reception of the core N, and so as to form a reservoir for oil or other liquid,which coats the insulated ico wire as the same is drawn through the ram covered wires.

Owing to the use of the hollow-core holder the projecting end. P of the core N is so short that it is not likely to be deflected to one side or the other so as to make uneven pi e, and as, the metal enters the hollow bridge-b och from opposite points the flow of metal'has no tendency to deflect the end of the tube. Three .or more openings arranged equidistantly may be used with the same efiect.

The end P of the core N need not be detachable in all cases, although it is'preferred to so construct it'in order that it can be renewed or one .of a different size substituted without changing the entire core.- I

I am aware that a hollow core, core-holder, and "die have been heretofore combined with the hollow column, lead-reservoir, andhollow ram of a lead-pipe press, and therefore do not claim this combination, broadly considered, my

improvements relating to features of construction whereby the detaching of. the core and core-holder can be readily efiected without disturbing the press and the ready adjustment of the core permitted for the purpose of lucking dilferent sizes of pipe.

I claim as my inventione 1. The combination of the lead reservoir, hollow ram, and hollow column of a lead-pipe press with the hollow core, core-holder, and die, said core-holder resting upon the top of the hollow column and being contained within the lead-chamber of the reservoir but unconfined vertically by said reservoir, as set forth. 2a The combination of the lead-reservoir hollow ram, and hollow column of a lead-pipe press with a structure comprising the ho ow' core, core-holder, and die, said core-holder being contained in the lower portion oi the lead-- Q reservoir, and being of tapered or conical form, as set forth. p

3. The combination of the lead-reservoir,

hollow ram, and hollow column of a lead-pipe press with the die, a core-holder resting upon the hollow column and supporting the core close to the delivery end of the same, and a hollow core, N, projecting above the lead-reservoir, adjustable in the core-holder, and having a tapering end projecting into the die, as set forth. p 4. The combination of the die, the threaded core N having a tapering end, P, and the coreholder J,-hav'ing a threaded opening for the core N, and a tubular projection bearing on said core above the thread, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two-sub scribing witnesses.

' J AMES TA'IFIATM. Witnesses:.

HENRY Bossnn'r, Hanna? SMITH. 

